Barack Obama has begun his latest foreign tour in India, the country that may help the US boost its economy and beef up security in the region. The president declared that the US and India stand united – a message he delivered on his visit to the site of the Mumbai terror attacks. 166 people were killed during the incident in 2008. Obama is also set to announce some lucrative deals with Indian business leaders. After India, the US leader is scheduled to visit Indonesia, South Korea and Japan.